C6H4ClNO2
157.55 g/mol
Pharmaceutical IntermediateWarning
2-Chloronicotinic acid
CAS2942-59-8EC220-937-0
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
2-Chloronicotinic acid is a halogenated derivative of nicotinic acid used as an intermediate in the synthesis of various bioactive compounds, including agrochemicals such as boscalid and diflufenican.
intermediate for boscalid synthesisintermediate for diflufenican synthesis
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
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Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 2-Chloronicotinic acid (CAS 2942-59-8) is 2933.39.
HS code (international, 6-digit)
2933.39
EU CN code (8-digit)
2933 39 99
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
2-chloropyridine-3-carboxylic acid
InChIKey
IBRSSZOHCGUTHI-UHFFFAOYSA-N
SMILES
C1=CC(=C(N=C1)Cl)C(=O)O
Synonyms (17)
- CNIS
- FLUNIXIN MEGLUMINE IMPURITY A (EP IMPURITY)
- Flunixin meglumine EP Impurity A; Niflumic acid EP Impurity A
- Niflumic acid impurity A, European Pharmacopoeia (EP)
- 2-Chloronicotinic acid
- 2-choronicotinic acid
- 3-Carboxy-2-chloropyridine
- FLUNIXIN MEGLUMINE IMPURITY A
- Flunixin Meglumine Impurity 3
- Nicotinic acid, 2-chloro-
- Niflumic acid impurity A CRS
- chloronicotinic acid
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